Liquid CO2 phase change impact device and slurry delivery pipeline blockage treatment method

Abstract

The present invention discloses a liquid CO2 phase change impact device and a method for treating blockage in a slurry conveying pipeline. The device includes a thermostatic tube, a release head is provided at the head end of the thermostatic tube, a liquid storage tube is coaxially sleeved in the thermostatic tube, and a heating tube is axially provided near the tail end of the thermostatic tube, the head end of the heating tube extends into the liquid storage tube; the heating tube is filled with heating material and axially provided with a detonating cord, the head end of the detonating cord extends from the head end of the heating tube, and the tail end of the detonating cord is electrically connected to a downhole detonator provided outside the thermostatic tube; the tail end of the release head extends into the thermostatic tube and is connected to a constant pressure energy release plate provided in the thermostatic tube; the release head is provided with a camera and a release hole that can be connected to the liquid storage tube. The method first determines whether there is a blockage in the pipeline by feeding pressure, and then selects an appropriate release head for clearing the blockage based on the image, and uses liquid CO2 phase change impact to clear the blockage in the pipeline, while ensuring the clearing effect and effectively reducing damage to the inner wall of the pipeline.

Description

Technical Field

[0001] The invention belongs to the technical field of mine mining, filling and pipeline transportation, and relates to a liquid CO2 phase change impact device and a method for treating blockage in a slurry transportation pipeline. Background Art

[0002] Long horizontal boreholes are often used in mine backfilling to transport slurry. The slurry is primarily composed of small particles of coal gangue, aeolian sand, and construction waste, as well as loess, cement, water, and other additives with coagulating or retarding properties. During long-distance slurry transportation, variations in distance, slurry state, and pipeline environment inevitably lead to slurry coagulation and accumulation within the pipeline, ultimately leading to pipeline blockage. Due to limitations in some borehole construction or technical processes, it's impossible to remove the blocked section individually, necessitating internal pipeline clearing.

[0003] While some existing mechanical devices and methods can resolve pipe blockages, some fail to completely clean the inner walls of the pipes. Slurry can re-condense within a short period of time, blocking the pipes. Repeated pipe blockages severely impact project quality and schedules, leading to significant economic losses. Other methods can even damage the pipes, further compromising project costs. Therefore, there is an urgent need for a device and method that can completely clear pipe blockages without damaging the pipes. Summary of the Invention

[0004] In response to the defects and shortcomings in the prior art, the present invention provides a liquid CO2 phase change impact device and a slurry conveying pipeline blockage treatment method to solve the technical problem of incomplete cleaning of blockages in the slurry conveying pipeline in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A liquid CO2 phase change impact device comprises a thermostatic tube, wherein the head end of the thermostatic tube is provided with a release head which is coaxial with the thermostatic tube and detachably fixedly connected to the thermostatic tube;

[0007] A liquid storage tube is coaxially sleeved in the constant temperature tube, and a heating tube is axially arranged near the tail end of the constant temperature tube, and the head end of the heating tube extends into the liquid storage tube;

[0008] The heating tube is electrically connected to a downhole detonator arranged outside the constant temperature tube;

[0009] The tail end of the release head extends into the constant temperature tube and is connected to a constant pressure energy release sheet arranged in the constant temperature tube; the release head includes a detection release head and a blockage clearing release head.

[0010] The present invention also has the following technical features:

[0011] Specifically, a plurality of detection and release channels are arranged at equal intervals along the circumferential direction in the detection and release head, and each of the detection and release channels is inclined toward the inner wall end of the coal seam borehole. The angle between the axis of the detection and release channel and the axis of the constant temperature tube is 30° to 80°. The head end of the detection and release head is also provided with a camera for collecting image information inside the pipeline.

[0012] Furthermore, the clearing and releasing head includes a first clearing and releasing head, a second clearing and releasing head and a third clearing and releasing head, the first clearing and releasing head includes a first releasing head body and a first releasing part that are connected, a first guide channel is set in the first releasing head body, a first release channel is set in the first releasing part, and the first guide channel is coaxially connected to the first release channel.

[0013] Furthermore, the second clearing and releasing head includes a second releasing head body and a second releasing part connected to each other, a second guide channel is set in the second releasing head body, a second release channel is set in the second releasing part, the second guide channel is connected to the second release channel, and the angle between the axis of the second guide channel and the axis of the second release channel is 30°~80°.

[0014] Furthermore, the third clearing and releasing head includes a third releasing head body connected thereto, a third releasing portion and a fourth releasing portion being symmetrically arranged at the front end of the third releasing head body, and the third releasing portion and the fourth releasing portion have the same structure;

[0015] A third guide channel is set in the third release head body, and a third release channel is set in both the third release part and the fourth release part. The third guide channel is connected to the third release channel, and the angle between the axis of the third guide channel and the axis of the third release channel is 30°~80°.

[0016] Furthermore, a liquid injection pipe connected to the liquid storage pipe is also provided at the tail end of the constant temperature pipe. The liquid injection pipe is connected to a pneumatic booster pump, and a one-way valve is provided on the liquid injection pipe.

[0017] Furthermore, an inner cavity is provided in the constant temperature tube, and the inner cavity includes a first cavity and a second cavity which are connected to each other, and a limiting step surface is formed at the connection between the first cavity and the second cavity. The liquid storage tube is provided in the first cavity, and the first sealing gasket, the constant pressure energy release plate and the second sealing gasket are provided in the second cavity from back to front.

[0018] The present invention also provides a method for treating a slurry delivery pipeline blockage, which is implemented by the liquid CO2 phase change impact device as described above and comprises the following steps:

[0019] Step 1: Start the pneumatic booster pump to inject liquid CO2 into the liquid storage pipe, then use the drill pipe to send the liquid CO2 phase change impact device connected to the detection release head into the slurry delivery pipeline. When the liquid CO2 phase change impact device moves along the slurry delivery pipeline, the feed pressure of the drilling rig is obtained in real time through the feed pressure acquisition module set in the drill pipe;

[0020] Step 2: Determine whether there is a blockage in the slurry delivery pipeline based on the obtained drilling rig feed pressure. After determining that there is a blockage in the slurry delivery pipeline, heat the heating pipe with the help of a downhole detonator to cause the liquid CO2 in the liquid CO2 phase change impact device to undergo a phase change into gaseous CO2, completing the initial liquid CO2 phase change impact treatment;

[0021] Step 3: Use a camera installed in the detection release head to collect image information in the slurry conveying pipeline, determine the result of the initial liquid CO2 phase change shock treatment based on the collected image information, and then determine whether it is necessary to use a clearing release head to perform a secondary liquid CO2 phase change shock treatment operation. If not, end the shock treatment operation. If so, proceed to step 4;

[0022] Step 4: Retract the drill bit, replace the clearing release head, and reinsert the liquid CO2 phase change impact device into the slurry delivery pipeline for secondary liquid CO2 phase change impact treatment. After the secondary liquid CO2 phase change impact treatment is completed, replace the detection release head again to obtain image information of the slurry delivery pipeline after the secondary liquid CO2 phase change impact treatment;

[0023] Step 5: Determine the result of the liquid CO2 phase change shock treatment based on the image information obtained after the secondary liquid CO2 phase change shock treatment of the slurry conveying pipeline;

[0024] If the blockage has been cleared, the secondary liquid CO2 phase change shock treatment operation is terminated. If the blockage has not been cleared, steps 3 and 4 are repeated until the blockage is cleared.

[0025] Furthermore, the step 2 of determining whether blockage occurs in the slurry delivery pipeline based on the obtained drilling rig feed pressure includes: when the drilling pressure collected at the current moment is greater than 1.2 times the drilling pressure collected at the previous moment, determining that blockage occurs in the slurry delivery pipeline.

[0026] Compared with the prior art, the present invention has the following beneficial technical effects:

[0027] The liquid CO2 phase change impact device provided by the present invention is suitable for clearing blockages in slurry conveying pipelines. Before and after the blockages are cleared, the situation of the blockage point can be observed through the camera provided in the device, and the number of impact treatments can be adjusted according to the clearing effect. The present invention provides clearing release heads with different structures. Operators can select a suitable clearing release head according to the collected images in actual construction. The impact angle of the release hole on the inner wall of the pipeline is controlled by the angle of the release hole, which can effectively avoid the gas impact from directly impacting the inside of the pipeline in the vertical direction. While ensuring the clearing effect, it can also effectively reduce the damage to the inner wall of the pipeline and avoid causing the pipeline to rupture. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the device of the present invention;

[0029] Figure 2 is a flow chart of the method of the present invention;

[0030] Figure 3 is a schematic diagram of the position of the directional drilling in Example 1;

[0031] Figure 4 This is a schematic diagram of the initial liquid CO2 phase change shock treatment in Example 1;

[0032] Figure 5 This is a comparison diagram of the working conditions in the slurry conveying pipeline before and after the blockage clearing operation in Example 1;

[0033] Figure 6 It is a cross-sectional view of the detection release head. Description of the drawings:

[0035] 1-constant temperature tube, 2-liquid storage tube, 3-heating tube, 4-detection release head, 5-clearing release head, 6-liquid injection tube, 7-one-way valve, 8-first sealing plate, 9-constant pressure energy release plate, 10-second sealing plate; 41-detection release channel, 42-camera; 51-first clearing release head, 52-second clearing release head, 53-third clearing release head; 511-first release head body, 512-first release part; 521-second release head body, 522-second release part; 531-third release head body, 532-third release part, 533-fourth release part.

[0036] The present invention will be described in detail below with reference to the accompanying drawings and specific implementation methods. DETAILED DESCRIPTION

[0037] In accordance with the above technical solution, specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solution of this application fall within the protection scope of the present invention.

[0038] Unless otherwise specified, the components in the present invention are commercially available.

[0039] It should be noted that in the following description, unless otherwise specified or limited, terms such as "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integrated connections; they can refer to direct connections or indirect connections, etc. Those skilled in the art will be able to understand the specific meanings of the above terms in this technical solution based on specific circumstances.

[0040] In the present invention, unless otherwise specified, directional terms such as "upper" and "lower" are generally defined based on the drawings of the corresponding figures, and "inside" and "outside" are defined based on the outline of the corresponding figures.

[0041] The present invention is further described in detail below with reference to the embodiments.

[0042] Example 1

[0043] Following the above technical solution, Figure 1 As shown, this embodiment provides a liquid CO2 phase change impact device, including a thermostatic tube 1, wherein the head end of the thermostatic tube 1 is provided with a release head which is coaxial with the thermostatic tube 1 and detachably fixedly connected;

[0044] A liquid storage tube 2 is coaxially sleeved inside the constant temperature tube 1, and a heating tube 3 is axially arranged near the tail end of the constant temperature tube 1, and the head end of the heating tube 3 extends into the liquid storage tube 2; the heating tube 3 is electrically connected to a downhole detonator arranged outside the constant temperature tube 1.

[0045] The liquid storage tube 2 is a container for liquid CO2 to undergo phase change. It can withstand a maximum pressure and a maximum temperature of 1000 MPa and 3000°C respectively. It has great durability and is reusable.

[0046] The heating tube 3 is filled with heating material and is also provided with a detonating cord. The detonating cord includes a core charge and a heating wire. The core charge cannot be ignited at room temperature. Even if it is placed in an environment with a gas concentration of 9% and powered on, no open flame will be generated. Only when the ambient pressure reaches or exceeds 5MPa can it react rapidly when a current of 0.8A or more is passed through it, and 800°C heat can be released within 20 milliseconds.

[0047] The downhole detonator can pass a current of more than 0.8A into the heating wire through the control cable, thereby igniting the core charge and ultimately causing the liquid CO2 to undergo a phase change.

[0048] The tail end of the release head extends into the constant temperature tube 1 and is connected to the constant pressure energy release sheet 9 provided in the constant temperature tube 1 ; the release head includes a detection release head 4 and a blockage clearing release head 5 .

[0049] The liquid CO2 phase change impact device with a detection and release head 4 is mainly used for detecting blockage conditions in pipelines and processing blockage objects, and the liquid CO2 phase change impact device with a clearing and release head 5 is used for processing blockage objects.

[0050] As a preferred solution of this embodiment, Figure 6 As shown, a plurality of detection and release channels 41 are arranged at equal intervals along the circumferential direction in the detection and release head 4. The angle between the axis of the detection and release channel 41 and the axis of the constant temperature tube 1 is 30° to 80°. The detection and release channel 41 is arranged obliquely toward the inner wall of the pipeline. The head end of the detection and release head 4 is also provided with a camera 42 for collecting image information inside the pipeline.

[0051] As a preferred solution of this embodiment, the clearing and releasing head 5 includes a first clearing and releasing head 51, a second clearing and releasing head 52 and a third clearing and releasing head 53. The first clearing and releasing head 51 includes a first releasing head body 511 and a first releasing part 512 that are connected to each other. A first guide channel is set in the first releasing head body 511, and a first release channel is set in the first releasing part 512. The first guide channel is coaxially connected to the first release channel.

[0052] The first clearing and releasing head 51 is suitable for slurry conveying pipeline blockage caused by accumulation of large pieces of gangue. The straight-head clearing and releasing head can ensure that the energy of the phase change impact is all concentrated in the front, and concentrate the impact on the condensate in the center of the pipeline blockage, so as to achieve the effect of clearing the blockage in the middle of the pipeline as soon as possible.

[0053] As a preferred solution of this embodiment, the second clearing and releasing head 52 includes a second releasing head body 521 and a second releasing part 522 that are connected to each other. A second guide channel is set in the second releasing head body 521, and a second release channel is set in the second releasing part 522. The second guide channel is connected to the second release channel, and the angle between the axis of the second guide channel and the axis of the second release channel is 30°~80°, and the second release channel is inclined toward the inner wall of the pipe.

[0054] The second clearing and releasing head is suitable for working conditions where debris accumulates on one side of the inner wall of the pipeline. It can concentrate all phase change impact energy to carry out targeted impact on the accumulation position, maximize the impact energy, and effectively save the total amount of CO2 consumed by the impact, reduce clearing costs, and improve removal efficiency.

[0055] As a preferred solution of this embodiment, the third clearing and releasing head 53 includes a third releasing head body 531 connected thereto, and a third releasing portion 532 and a fourth releasing portion 533 are symmetrically provided at the front end of the third releasing head body 531. The third releasing portion 532 and the fourth releasing portion 533 have the same structure.

[0056] A third guide channel is set in the third release head body 531, and a third release channel is set in both the third release part 532 and the fourth release part 533. The third guide channel is connected to the third release channel, and the angle between the axis of the third guide channel and the axis of the third release channel is 30°~80°. The third release channel is inclined toward the inner wall of the pipe.

[0057] The third release head is suitable for situations where debris accumulates around the pipe walls but the center is not completely blocked, resulting in reduced flow and increased pressure. The third release head delivers gas impact to the pipe walls, eliminating the need to waste impact energy in the unblocked middle of the pipe. This effectively utilizes impact energy and provides a more targeted clearing effect. Compared to the detection release head, the third and fourth release channels in the third and fourth release heads have larger apertures, resulting in a more concentrated impact force.

[0058] As a preferred solution of this embodiment, a liquid injection pipe 6 connected to the liquid storage pipe 2 is further provided at the tail end of the constant temperature tube 1. The liquid injection pipe 6 is connected to the pneumatic booster pump, and a one-way valve 7 is provided on the liquid injection pipe 6.

[0059] As a preferred embodiment of this embodiment, the thermostatic tube 1 is provided with an inner cavity 11, which includes a first cavity and a second cavity that are connected to each other. The connection between the first cavity and the second cavity forms a limiting step surface. The liquid storage tube 2 is provided in the first cavity 11, and the limiting step surface can limit the position of the liquid storage tube 2. The second cavity is provided with a first sealing gasket 8, a constant pressure energy release plate 9, and a second sealing gasket 10 in sequence from back to front. The first sealing gasket 8 and the second sealing gasket 10 are used to ensure the seal between the liquid storage tube 2 and the release head.

[0060] The operating principle of this device is as follows:

[0061] A pneumatic booster pump is used to compress the gaseous CO2 into liquid and then store it in the liquid storage pipe 2. The detonating cord is ignited by a downhole detonator arranged outside the constant temperature tube 1 to increase the temperature of the liquid CO2 in the liquid storage tank 2. When the temperature of the liquid CO2 exceeds 31.06°C, the CO2 in the liquid storage pipe 2 will enter a supercritical state or a gaseous state. At this time, the pressure in the liquid storage pipe 2 will increase sharply. When it increases to the shear limit strength of the constant pressure energy release plate 9, the pressure in the liquid storage pipe 2 will be released in the detection release head 4 or the clearing release head 5, and the blockage on the inner wall of the pipeline will be cleared by the impact force generated by the release.

[0062] Example 2

[0063] In this embodiment, a backfill mining process carried out in a coal mine in northern Shaanxi uses a horizontal well drilled on the ground as a slurry conveying channel to fill the goaf behind the backfill mining working face with backfill slurry. The diameter of the horizontal well drilled on the ground is 139 mm. The slurry is conveyed in the casing. The main components of the slurry are coal gangue, aeolian sand, fly ash, loess, water, and some additives with quick-setting or slow-setting effects. Due to some changes in the slurry preparation composition during the ground mixing process, slurry precipitation and blockage occurred in the horizontal filling pipeline of a certain rock formation, and it is necessary to install the horizontal filling pipeline at the same time. Figure 3 The slurry delivery pipeline in the directional drill hole in the rock formation shown is cleared.

[0064] like Figure 2 As shown, this embodiment provides a method for treating a slurry delivery pipeline blockage, which is implemented by the liquid CO2 phase change impact device provided in Example 1, and includes the following steps:

[0065] Step 1: Start the pneumatic booster pump to inject liquid CO2 into the liquid storage pipe, then use the cable drill pipe to send the liquid CO2 phase change impact device connected to the detection release head into the slurry delivery pipeline. When the liquid CO2 phase change impact device moves along the slurry delivery pipeline, the feed pressure of the drilling rig is obtained in real time through the feed pressure acquisition module set in the drill pipe;

[0066] Step 2: Determine whether there is blockage in the slurry delivery pipeline based on the obtained drilling rig feed pressure. After determining that there is blockage in the slurry delivery pipeline, heat the heating pipe with the help of a downhole detonator to cause the liquid CO2 in the liquid CO2 phase change impact device to undergo a phase change into gaseous CO2, completing the initial liquid CO2 phase change impact treatment; the initial liquid CO2 phase change impact treatment is as follows: Figure 4 shown.

[0067] Step 3: Use a camera installed in the detection release head to collect image information in the slurry conveying pipeline, determine the result of the initial liquid CO2 phase change shock treatment based on the collected image information, and then determine whether it is necessary to use a clearing release head to perform a secondary liquid CO2 phase change shock treatment operation. If not, end the shock treatment operation. If so, proceed to step 4;

[0068] Step 4: Retract the drill bit, replace the clearing release head, and reinsert the liquid CO2 phase change impact device into the slurry delivery pipeline for secondary liquid CO2 phase change impact treatment. After the secondary liquid CO2 phase change impact treatment is completed, replace the detection release head again to obtain image information of the slurry delivery pipeline after the secondary liquid CO2 phase change impact treatment;

[0069] After image confirmation, it was found that there was a blockage at the top of the slurry conveying pipeline, and the second clearing and release head was selected to clear the blockage.

[0070] Step 5: Determine the result of the liquid CO2 phase change shock treatment based on the image information obtained after the secondary liquid CO2 phase change shock treatment of the slurry conveying pipeline;

[0071] If the blockage has been cleared, the secondary liquid CO2 phase change shock treatment operation is terminated. If the blockage has not been cleared, steps 3 and 4 are repeated until the blockage is cleared.

[0072] In this embodiment, the interior of the pipeline before and after clearing the blockage is as follows Figure 5 As shown, in this embodiment, four impact operations were performed on the blockage, and the clearing effect was visually observed, taking a total of two hours, with good clearing results. Blockage did not reoccur at this location for a long time. Compared with other blockage clearing techniques, which take several hours each time and often fail to clear the blockage thoroughly, resulting in reoccurrence of blockage at the same location within a period of slurry delivery, the method of the present invention saves a considerable amount of clearing time for engineering grouting. The unobstructed filling pipeline saves significant construction costs.

[0073] In summary, the liquid CO2 phase change impact device provided by the present invention is suitable for clearing blockage points in slurry conveying pipelines. Before and after clearing, the situation of the blockage points can be observed through the camera provided by the device, and the number of impacts can be controlled, effectively avoiding direct impact on the inside of the pipeline and avoiding damage to the inner wall of the pipeline when the energy is large, causing adverse effects.

[0074] In other solutions, the existing JKN90-1 liquid CO2 phase change impact device was used to deal with the blockage of the slurry conveying pipeline, which also achieved the effect of controllable blasting range, controllable vibration range, and no large-scale mining earthquake.

[0075] The above implementation process is merely an example to clearly illustrate the present application and is not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications derived therefrom remain within the scope of protection of this application.

Claims

1. A method for treating blockage in a slurry delivery pipeline, characterized in that: The method is implemented by a liquid CO2 phase change impact device, the liquid CO2 phase change impact device comprising a constant temperature tube (1), the head end of the constant temperature tube (1) being provided with a release head which is coaxial with the constant temperature tube (1) and detachably fixedly connected; A liquid storage tube (2) is coaxially sleeved in the constant temperature tube (1), and a heating tube (3) is axially arranged near the tail end of the constant temperature tube (1), with the head end of the heating tube (3) extending into the liquid storage tube (2); The heating tube (3) is electrically connected to a downhole detonator arranged outside the constant temperature tube (1); The tail end of the release head extends into the constant temperature tube (1) and is connected to a constant pressure energy release sheet (9) provided in the constant temperature tube (1); the release head comprises a detection release head (4) and a blockage clearing release head (5); The following steps are involved: Step 1: Start the pneumatic booster pump to inject liquid CO2 into the liquid storage pipe, then use the drill pipe to send the liquid CO2 phase change impact device connected to the detection release head into the slurry delivery pipeline. When the liquid CO2 phase change impact device moves along the slurry delivery pipeline, the feed pressure of the drill pipe is obtained in real time through the feed pressure acquisition module set in the drill pipe; Step 2: Determine whether there is a blockage in the slurry delivery pipeline based on the obtained drill pipe feed pressure. After determining that there is a blockage in the slurry delivery pipeline, heat the heating tube with the help of a downhole detonator to cause the liquid CO2 in the liquid CO2 phase change impact device to undergo a phase change into gaseous CO2, completing the initial liquid CO2 phase change impact treatment; Step 3: Use the camera set in the detection release head to collect image information in the slurry conveying pipeline, determine the result of the initial liquid CO2 phase change shock treatment based on the collected image information, and then determine whether it is necessary to use the clearing release head to perform a secondary liquid CO2 phase change shock treatment operation. If not, end the shock treatment operation. If so, proceed to step 4; Step 4: Retract the drill pipe, replace the clearing release head, and reinsert the liquid CO2 phase change impact device into the slurry delivery pipeline for secondary liquid CO2 phase change impact treatment. After the secondary liquid CO2 phase change impact treatment is completed, replace the detection release head again to obtain image information of the slurry delivery pipeline after the secondary liquid CO2 phase change impact treatment; Step 5: Determine the result of the liquid CO2 phase change shock treatment based on the image information obtained after the secondary liquid CO2 phase change shock treatment of the slurry conveying pipeline; If the blockage has been cleared, the secondary liquid CO2 phase change shock treatment operation is terminated. If the blockage has not been cleared, steps 3 and 4 are repeated until the blockage is cleared.

2. The method for treating a slurry delivery pipeline blockage according to claim 1, wherein: A plurality of gas release channels (41) are arranged at equal intervals along the circumferential direction in the detection and release head (4), and the angle between the axis of the gas release channel (41) and the axis of the constant temperature tube (1) is 30° to 80°. The head end of the detection and release head (4) is also provided with a camera (42) for collecting image information inside the pipeline.

3. The method for treating blockage in a slurry delivery pipeline according to claim 1, wherein: The clearing and releasing head (5) comprises a first clearing and releasing head (51), a second clearing and releasing head (52) and a third clearing and releasing head (53); the first clearing and releasing head (51) comprises a first releasing head body (511) and a first releasing portion (512) which are connected to each other; a first guide channel is provided in the first releasing head body (511); a first releasing channel is provided in the first releasing portion (512); and the first guide channel and the first releasing channel are coaxially connected.

4. The method for treating a slurry delivery pipeline blockage according to claim 3, wherein: The second clearing and releasing head (52) comprises a second releasing head body (521) and a second releasing portion (522) connected to each other, a second guide channel is provided in the second releasing head body (521), a second releasing channel is provided in the second releasing portion (522), the second guide channel is connected to the second releasing channel, and the angle between the axis of the second guide channel and the axis of the second releasing channel is 30° to 80°.

5. The method for treating a slurry delivery pipeline blockage according to claim 3, wherein: The third clearing and releasing head (53) comprises a third releasing head body (531) connected thereto, a third releasing portion (532) and a fourth releasing portion (533) being symmetrically arranged at the front end of the third releasing head body (531), and the third releasing portion (532) and the fourth releasing portion (533) having the same structure; A third guide channel is provided in the third release head body (531), and a third release channel is provided in both the third release portion (532) and the fourth release portion (533). The third guide channel is connected to the third release channel, and the angle between the axis of the third guide channel and the axis of the third release channel is 30° to 80°.

6. The method for treating a slurry delivery pipeline blockage according to claim 1, wherein: The inner tail end of the thermostatic tube (1) is also provided with a liquid injection tube (6) connected to the liquid storage tube (2); the liquid injection tube (6) is connected to a pneumatic booster pump, and a one-way valve (7) is provided on the liquid injection tube (6).

7. The method for treating a slurry delivery pipeline blockage according to claim 1, wherein: An inner cavity is provided in the thermostatic tube (1), and the inner cavity includes a first cavity and a second cavity which are connected to each other. A limiting step surface is formed at the connection between the first cavity and the second cavity. The liquid storage tube (2) is provided in the first cavity (11), and a first sealing gasket (8), a constant pressure energy release plate (9), and a second sealing gasket (10) are provided in sequence from back to front in the second cavity.

8. The method for treating a slurry delivery pipeline blockage according to claim 1, wherein: Determining whether blockage occurs in the slurry delivery pipeline based on the acquired drill pipe feed pressure in step 2 includes: determining that blockage occurs in the slurry delivery pipeline when the feed pressure acquired at the current moment is 1.2 times greater than the feed pressure acquired at the previous moment.

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